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Summary of Significant Accounting Policies - Property Plant and Equipment (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Property, Plant and Equipment        
Loss on disposal of leasehold improvements $ 0 $ 0 $ (672,000) $ 0
Loss on disposal of property and equipment   0 672,000 0
Impairment of property, plant and equipment $ 0 $ 0 $ 0 $ 0
Office equipment        
Property, Plant and Equipment        
Property, plant and equipment     3 years  
Lab equipment | Minimum        
Property, Plant and Equipment        
Property, plant and equipment     5 years  
Lab equipment | Maximum        
Property, Plant and Equipment        
Property, plant and equipment     10 years  
Furniture and fixtures        
Property, Plant and Equipment        
Property, plant and equipment     5 years